Window and ventilator actuator and lock



p 1952 H. s. CARLSTON ETAL 2,610,843

WINDOW AND VENTILATOR ACTUATOR AND LOCK 2 SHEETSSHEET l Filed July 18,1951 VII/I ATTORNEYS Sept. 16, 19 2 H. s. CARLSTON EI'AL 2,510,348

WINDOW AND VENTILATOR ACTUATOR AND LOCK Filed July 18, 1951 2SHEETS-SHEET 2 I .2: J7 Q%. 9 v I 1.4 El! ATTORNEYS Patented Sept. 16,1952 oFFlcE f WINDOW AND VENTILATOR ACTUATOR AND LOCK Hamilton S.Carlston and Herbert E. Morrow,

Fresno, Calif.

ApplicationJuly 18, 1951, Serial No. 237,466

4 Claims. (CL 268-119) This invention relates to window and ventilatoroperating and locking or latching devices, ,and in particular an armactuated by a hand crank through latching elements whereby with thecrank pressed into a small casing and turned the position of a window,such as a casement window or ventilator is adjusted to a partly openposition and which, when the crank is released, will not operate to openthe window to a-different position until the window has been closed.

The purpose of this invention is to provide a window and ventilatoroperating-device with which a sash is partly opened andwhich lacks thewindow in the partly opened position preventing further opening thereofuntil the window-has been closed whereby it is impossible for anintruder to open the window sufficiently to permit passage therethroughand also where it is impossible for the window to be accidentally openedby a child.

Various types of operating devices have been provided for casementwindows and ventilators but in the conventional type of crank operatedThe object of this invention is, therefore, to

provide means for incorporating latching instrumentalities in a handcrank operating device for pivotally mounted windows, ventilators, andthe like whereby it is possibleto lock the windows or ventilators inpartly open positions.

Another object of the invention is to provide an automatically lockingwindow operating device that may be installed on windows now in usewithout changing the design or construction thereof.

A further object of the invention is to provide latching means in awindow and ventilator operating device in which the operating device isof a simple and economical construction.

With these and other objects and advantages in view the inventionembodies a casing adapted to be positioned on a window sill with anoperating arm journaled therein and extended therefrom and having meanson the outer end for slida-bly connecting the arm to the sash of awindow or ventilator, a transversely positioned shaft also journaled inthe casing and having means thereon for operating the arm, a hand crankslidably mounted on the outer end of the shaft, a latch for preventingrotation of the shaft in one direction and a cam for actuating the latchto the position of releasing the shaft.

Other features and advantages of the invention will appear from thefollowing description taken in connection with the drawings wherein:

Figure 1 is a sectional plan through a window of the easement typeshowing the operating device installed thereon and showing the windowinthe closed position.

Figure 2 is a sectional plan through the casing of the'operating deviceshowing the parts with the sash in the osition shown in Figure 1.

Figure 3 is a cross section through the lower part of the sash andwindow frame and showing the operating device mounted on the frame withpart of the said operating device broken away and shown in section.

Figure 4 is a cross section through the casing taken on line 4-4 ofFigure 2 showing the hand crank mounting and illustrating the parts withthe crank extended.

Figure 5 is a similar view showing the crank pressed inwardly in whichposition the ratchet teeth ride on the under surface of the latch memberor bar.

Figure 6 is a longitudinal section through the operating casing taken online 6-6 of Figure 2.

Figure '7 is a sectional plan similar to that shown in Figure 1 showingthe sash in a partly open position.

Figure 8 is a sectional plan similar to that shown in Figure'2 showingthe positions of the parts with the sash extended as illustrated in Fiure '7. I

Figure 9 is a section through the operating casing taken on line 99 ofFigure 8 showing the latch bar dropped downwardly and with a latchthereon positioned between the teeth of the ratchet.

Figure 10 is a detail similar to that shown in Figures 4 and 5 with theshaft and hand crank shown in elevation illustrating the latch bar inthe position of holding the hand crank outwardly. Figure '11 is a detailshowing the ratchet wheel and illustrating the wheel on a square shaft.

Figure 12 is a fragmentary detail illustrating part of the latch bar. a

Figure 13 is a detail illustrating a section of the hub of a window sashoperating arm and showing a cam in the upper face of the hub.

Fi ure 14 is a detail similar to that shown in 3 Figure 11 illustratingthe ratchet wheel mounted on the shaft through splines.

Figure 15 is a sectional plan through a portion of the operating casingand illustrating a modiiication wherein teeth are provided in the end ofa sleeve positioned on the hand crank whereby the ratchet wheel iseliminated.

Figure is is a cross section through the casing, similar to Figure 4,illustrating the position of the tubular shaft with the teeth formed inthe end thereof.

Figure 17 is a section illustrating a latch bar of the type used withthe operating device illustrated in Figure 15. i

Referring now to the drawings wherein like reference characters denotecorresponding parts the improved window operating device of thisinvention includes a box-like casing II, a transversely disposed shaftii Journaled in the casing and having a worm l2 thereon, a hand crank llslidably mounwd on the shaft, a latch bar it pivotally mounted in thecasing and having a tooth ll thereon, a ratchet wheel it positioned overthe shaft ii. an arm il pivotally mounted by a vertically disposed shaftil in the casing ii and a guide ll adapted to be positioned on a sash IIand adapted to be connected to the arm H by a pin fl having a roller 22thereon.

The small housing or casing II is provided with end walls 23 and 14, alower panel 2|, an upper panel 2' and a cover plate 21. The cover plate21 is held in position by screws 28 that are threaded in the lugs 29 inthe corners of the casing.

The shaft H; which is formed as illustrated in Figures 4 and 5, isjournaled, at the point 3| in an opening Si in the base of the casingand the shaft is held in position by a set collar 32 that is secured onthe outer end of the section ll by a set screw 33. The opposite end ofthe shaft II is provided with a square section 84 and a spring ii isprovided in asocket 08 in the end of the said square section.

The shaft is also provided with a tubular section having a square end 31that is longitudinally slidable on the section 34 and the end 31 extendsfrom a hub is that extends through the cover plate 11 of the casing andthat is provided with a socket is in which a pin ll with the hand crankit thereon is secured by a set screw ll.

The ratchet wheel II is positioned on the inner end of the'end 31 of thetubular shaft and with the parts in the position shown in Figure whereinthe crank it is held inwardly the ratchet wheel ridu against the undersurface of the latch bars H, as illustrated in Figure 6. With the partsin this position the shaft II is rotated by crank II to adjust theposition of the arm [1. the worm If meshing with the worm gear teeth 4!in the hub 43 on the end of the arm II. and when the crank is releasedthe spring urges the tubular shaft section outwardly with the ratchetwheel ll passing beyond the latch bar and with the tooth ll droppinginto engagement with one of the teeth of the ratchet wheel It.

The latch bar it is pivotally mounted in ears 44 and ll by a pin II thatextends through an opening 41 in the latch bar and the oppositeend ofthe bar is provided with an arcuate surface 40 that rides upwardly overthe corresponding surface 4! of a cam II that is positioned on the uppersurface of the hub 43 of the arm l1 and as the arm II moves backward tothe position shown in Figures 1 and-2 the cam ll engages hub ispositioned between the upper and lower panels of the casing by spacingsleeves l2 and II.

With the parts as disclosed and described. and starting with the windowclosed as illustrated in Figure 1 wherein the cam It holds the latch barll upwardly as shown in Figure 6. the crank it is pressed inwardly withthe ratchet wheel ll passing under the latch bar It whereby the crank isrotated in a'counter-clockwise direction with the worm ll turning thehub 43 and arm I! outwardly to the position shown in Figure 7. In thismovement the cam ll moves beyond the end of the latch bar II and thelatch bar is retained in the upward position bythe teeth of the ratchetwheel ll which slide against the under surface of the latch bar.

With the sash ll of the window in the position shown in Figure 7 thehand crank it is released whereby the spring ll snaps the hand crankoutwardly drawing the ratchet wheel it away from the latch bar it sothat the latch bar drops downwardly to the position shown in Figure 9with the tooth ll dropping inward between the teeth of the ratchetwheel. By this means the crank II is held outwardly. In this positionthe crank can be rotated in a clockwise direction only whereby the armI! is actuated to close the win- 1 dow. The tooth ll prevents rotationof. the

ratchet wheel in the opposite direction to open the window so that thewindow can only be operated to the closing position, however, when thesash reaches the closed position the cam it again elevates the latch barIt whereby the window is again adapted to be opened. The window,therefore, is only adapted to be operated from the inside when it isadjusted to a partly open position and it is only adapted to be closedby the latch whereby opening travel thereof is prevented.

In the design illustrated in Figures l5, l6 and 17 wherein teeth I areprovided in the end of a hub ll similar to the end 31 of the tubularshaft section in which the crank II is positioned and these teeth arepositioned to receive a tooth It from a latch bar I! that is pivotallymounted in the casing is by a pin II and as the window is closed thelatch bar I1 is moved upwardly by a cam I on a hub ll, similar to thehub ll.

With the latch bar I! held upwardly the shaft II. which is Journaled inthe casing It, is free to rotate in a counterclockwise direction withthe worm t3 meshing with the worm gear teeth 84 of the hub CI foroperating the hub to open the window and when the window is adiusted tothe position desired the crank on the end of theshaft as is releasedwhereby the hub u moves outwardly to permit the latch bar I! to dropdownwardly to the position shown in Figure 17 wherein the tooth Itengages the teeth It to prevent rotation of the hub in thecounterclockwise directioh. The latch bar 81 is urged in the positionshown in Figure 15 by a spring I! which is secured in the casing by ascrew '1. The shaft 12 isioumaled-inthe casing is with spin and setcollar similar to corresponding parts as indicated by the numerals 3|and 32 in the design shown in Figure 5 and the hub SI of an arm similarto the arm H is journaled in the casing on a shaft 68.

The parts 55 and 65, referring to the hub and shaft are also similar tocorresponding parts shown in Figure 5 and the shaft 65 in which a crank69 similar to the crank I3 is mounted is secured by a screw and a pin H.The hub and shaft are also resiliently urged outwardly by a spring 12which is positioned in the hub 55 in the inner end of which the teeth 54are provided as shown in Figure 16.

With the parts arranged in this manner the crank 69 is moved inwardly,similar to the section of the crank l3 and by this means the arm,similar to the arm I1 is actuated to adjust the window sash in a partlyopened position, as illus trated in Figure '7. In this movement thelatch bar 51 is held upwardly by the cam 60 and upon release of thecrank 60 the latch bar 5'! drops downwardly with the tooth 56 engagingthe teeth 54 allowing the crank to be rotated to close the window andpreventing rotation thereof for opening the window.

In the design illustrated in Figure 14 a ratchet wheel 13, similar tothe wheel I6 is slidably mounted on an end 14 of a shaft, similar to theshaft II with splines 15 whereby the outer tubular section of the shaftis free to slide longitudinally to permit inward movement of the crank13 and also to permit outward movement thereof by a spring 16 that ispositioned within the member I4.

It will be understood that other modifications may be made in the designand arrangement of the parts without departing from the spirit of theinvention.

What is claimed is:

1. In a window sash operator, the combination which comprises a windowframe, a sash pivotally mounted in the window frame, a casing positionedon the window frame, an arm pivotally mounted in the casing andextending therefrom, means operatively connecting the extended end ofthe arm to the sash, said arm having a hub with worm gear teeth in theperipheral surface on the end thereof positioned in the casing, a wormgear positioned in the casing and meshing with the teeth of the hub ofthe arm, a shaft extended through the casing for mounting the worm gear,a tubular section slidably mounted on one end of the shaft, a hand crankcarried by the outer end of the tubular section of the shaft, a ratchetwheel mounted on the tubular section of the shaft, a latch bar having atooth thereon pivotally mounted in the casing and positioned whereby thesaid tooth is adapted to drop into engagement with teeth of the saidratchet wheel, and means actuating the said latch bar for moving thetooth out of engagement with the teeth of the ratchet wheel upon closingof the sash.

2. In a window sash operator, the combination which comprises a windowframe, a sash pivotally mounted in the window frame, a casing positionedon the window frame, an arm pivotally mounted in the casing and extendedtherefrom, means operatively connecting the extended end of the arm tothe sash, said arm having a hub with worm gear teeth in the peripheralsurface on the end thereof positioned in the casing, a worm gearpositioned in the casing and meshing with the teeth of the hub of thearm, a shaft extended through the casing for mounting the worm gear, atubular section slidably mounted on one end of the shaft, a hand-crankcarried by the outer end of the tubular section of the shaft, a ratchetwheel mounted on the tubular section of the shaft, a latch bar having atooth thereon pivotally mounted in the casing and positioned whereby thesaid tooth is adapted to drop into engagement with teeth of the saidratchet wheel, means actuating the said latch bar for moving the toothout of engagement with the teeth of the ratchet wheel upon closing ofthe sash, said tubular section of the shaft adapted to be moved inwardlyfor rotation thereof by the crank to operate the window sash, andresilient means within the shaft for moving the said tubular section andcrank outwardly upon release of the crank.

3. In a window sash operator, the combination which comprises a box-likecasing, an arm having a hub with worm gear teeth in the peripheralsurface journaled through the hub in the casing, a worm positioned inthe casing, a shaft journaled in the casing and on which the worm ispositioned, said shaft positioned wherein the worm is in engagement withthe worm gear teeth of the hub of the arm, a tubular section slidablymounted on one end of the shaft, a hand crank carried by the outer endof the said tubular section, a ratchet wheel mounted on the inner end ofthe tubular section of the shaft, a spring in the shaft for urging thesaid tubular section thereof outwardly, a latch bar pivotally mounted inthe casing and positioned to ride upon the ratchet wheel with theratchet wheel moved inwardly by the crank, said latch bar having a toothon one side positioned to engage the teeth of the ratchet wheel with theratchet wheel and crank moved outwardly by the spring, and a cam on thehub of the arm for elevating the latch bar for positioning the latch barabove the ratchet wheel.

4. In a window sash operator, the combination which comprises a windowframe, a sash pivotally mounted in the window frame, a' casingpositioned on the window frame, an arm pivotally 'mounted in the casingand extended therefrom,

means operatively connecting the extended end of the arm to the sash.said arm having a hub with gear teeth on the end thereof positioned inthe casing, a gear positioned in the casing and meshing with the teethof the hub of the arm, a shaft extended through the casing for mountingthe gear, a tubular section slidably mounted on the shaft, a crankcarried by the outer end of the tubular section of the shaft, a

ratchet wheel mounted on the tubular section of the shaft, a latch barhaving a tooth thereon pivotally mounted in the casing and positionedwhereby the said tooth is adapted to drop into engagement with teeth ofthe said ratchet wheel, and means actuating the said latch bar formoving the tooth out of engagement with the teeth of the ratchet wheelupon closing of the sash.

HAMILTON S. CARLSTON. HERBERT E. MORROW.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,274,471 Todd Aug. 6. 19181,414,000 Todd Apr. 25, 1922 1,967,481 Schaifert July 24, 1934

